the movie "Doubt"

Do you think Father Flynn was guilty or not in the movie "DOUBT".. i have to write an essay and i dont know where to start

i watched the movie, the controversy is that you never know the truth
first of all, you have to take a stand, no matter reasonable or not
pro or con for Father Flynn, and left other minds out
develop your idea through example and evidence
the important thing is---don't let your doubt destroy your thesis, stick with it, never say anything against it

well i think he is guilty
one of the biggest reasons why i think this is because in the movie, when the boy is in class and he is called down to the rectory he was fine before, than when he came back sister james noticed that his breath smells like alcohol which is proof that father Flynn actually gave him the wine